Arts professionals returning to England after working abroad need not self-isolate.
The exemption for workers returning from amber but not red list countries has been reintroduced. An initial scheme was suspended in January.
Organisations must submit an application to Arts Council England on their worker's behalf, and the worker must carry a signed copies of the application and their exemption letter with them at all times.
The Musicians' Union said the amount of information and time needed to get an exemption was prohibitive.
"Any last-minute gigs that musicians often accept means they may well have to self-isolate on return to the UK regardless."